"So when Nancy Pelosi was the speaker of the House you asked her to vote on things that the Republican Party wanted?" Labrador responded. "But all of a sudden, just because you don't like the fact that the Republicans are in control of the House of Representatives, you want to make sure that the Republicans actually pass the Democrat …"

"I don't have a stake in this," Cooper interrupted.

"You seem to," Labrador said.

"This is the way it works in journalism," Cooper said. "When you're not on Fox News, you get contentious interviews. When you're not on MSNBC and a liberal, you get contentious interviews. My job is to ask you questions that are different than you think."

Cooper said he would next be interviewing Rep. Elijah Cummings, a Maryland Democrat, and asking questions that pushed back on his position.

Not everyone agreed that he fulfilled his promise:

Anderson Cooper promises #GOP Congressman he will be just as tough on #Democrat in next interview. Doesn't happen that way ..as usual @CNN